Bug 1228416: make artifacts/public directory; r=armenzg

--HG--
extra : commitid : FQIlaGVgJAy
extra : rebase_source : 590bb47657679ce045de90c91a3d0fa159789789
extra : amend_source : 3d5db47a2d5dab74c57e7eff46ecef1c57459b9a

testing/taskcluster/scripts/tester/test-linux.sh

@@ -27,7 +27,7 @@ if [[ -z ${MOZHARNESS_URL} ]]; then exit 1; fi
 if [[ -z ${MOZHARNESS_SCRIPT} ]]; then exit 1; fi
 if [[ -z ${MOZHARNESS_CONFIG} ]]; then exit 1; fi
 
-mkdir -p ~/artifacts
+mkdir -p ~/artifacts/public
 
 cleanup() {
     if [ -n "$xvfb_pid" ]; then